We all know the story: a small group of friends take a weekend vacation to a secluded location, where they get drunk, have fun, and screw. Then, a monster appears! It picks them off one by one until finally, one of two things happens: the movie ends with a lone survivor standing over the body of the monster, or the monster reigns triumphant to kill again another day.
This is B-movie heaven, where sometimes the living envy the dead. And now you get to be one of those hapless characters fighting to survive.